Door



NN 1 N N m April 8 1924,

F'. A. BURKART DOOR v 1922 3 Sheets-Sheet 1 Filed May 1 Mofiagnwnloz April 8 1924. I

F. A. BURKART DOOR Filed May 11. 1922 3 Sheets--Sheet 2 alfozucq April 8 1924.

F. A. BURKART DOOR Filed May. 11, 1922 3 Sheets-Sheet 3 Patented Apr. 8, 1924.

UhlllTEQ STATES FRANK A. BUBKART, OF CLEVELAND, OHIO.

DOOR.

' Application filed May 11, 1922. Serial No. 560,172.

To all whom it may concern:

Be it known that I, F RANK A. BURKART, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a new and useful Door, of which the following is a specification.

This invention aims to provide novel means whereby a plurality of panels may be held in closed position, to form a barrier for a doorway. Another object of the invention is to provide novel means for raising the panels to an open position.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains.

Figure 1 shows in vertical section, a device constructed in accordance with the invention; Figure 2 is an elevation, the line 1-1 in Figure 2 indicating the cutting plane on which Figure 1 is taken; Figure 3 is a sectional detail showing the latch; Figure 4; is a top plan of the complete device; Figure 5 is a side elevation wherein the structure is viewed at right angles to the showing ofFigure 2; Figure 6 is a cross section on the line 66 of Figure 2; Figure 7 is a fragmental section showing a modification; Figure 8 is a sectional view showing a modification; Figure 9 is an elevation showing the device of Figure 8.

In carrying out the invention there is provided a box-like frame 1 open at the front and-at the back. A guard plate 2 is secured to the back of the frame at the top thereof. A. guard plate 6 is secured to the frame 1 at the top of the frame. On the sides of the frame 1, and within the same, guide'strips 3 are secured. Cover plates 4 are attached to the guide strips 3 and are provided with shoulders 5 which are spaced vertically, the shoulders being offset horizontally, so that the cover plates 1, in substance, are constructed like steps. The cover plates 4 serve to support the panels, hereinafter described, when the panels are lowered as shown in Figure 1. Further the cover plates shield those portions of the guide strips 3 which would otherwise be exposed when the panels are lowered, the guide strips 3 thus being protected from the weather. The guard plate 6 has an inwardly extended flange 7.

Panels 8 are mounted to vertical reciprocation between the guide strips 3 and,

preferably are made of metal. The panels 8 may be provided with glass plates, if transparency is desired, this being a detail well within the skill of a mechanic and unnecessary to show in the drawings. Each panel 8 has a lower flange 9 and an upper flange 10 the flanges 9 and 10 projecting in opposite directions. The upper flange 10 on one panel overhangs the lower flange 9 on the panel next thereabove, as shown in Figure 1. The lower flange 9 of the lowermost panel 8 is secured to a rider 11 mounted to slide between the cover plates 4. The upper flange 10 of the uppermost panel 8 overhangs the flange 7 on the guard plate 6, when the panels are lowered, as shown in Figure 1.

Any suitable means may be provided for raising the rider 11. 7 If desired, the lower, ends of the flexible elements 12 may be secured at 14 to the'lowermost panel 8 which is connected to the rider. The flexible elements 12 are connected to a single flexible element 16 which is downwardly extended, the flexible elements 12 being trained across guide pulleys 31 mounted on one side of the frame 1 as shown in Figure 2. The single flexible element 16 carries a counterweight 17, offsetting the weight of the panels 8. The flexible element 16 extends downwardly around an idler 18 on one side of the frame l, and, then, is prolonged upwardly, as shown in Figure 5, to a winding device 19 mounted on the side of the frame 1, the shaft of the winding device 19 projecting through one side of the frame 1, within the frame, as indicated in Figures 1, 2 and 6,, the extremity of the shaft of the winding device carrying a detachable crank 20. Latches 21 of any desired construction, are mounted on the side portions of the'frame 1, at the lower end thereof, and are adapted to engage detachably above the lower'flange 9 on the lowermost panel 8, when the panels are lowered.

When the panels are lowered, as shown in Figure 1, the latch 21 holds down the lowermost panel 8. Further, since the upper flange 10 on each panel overhangs the lower flange of the next adjoining panel, no one panel can be lifted up, independently of the other panels. The panels cannot slide down wardly, since they are supported on the shoulders 5 of the cover plates 4. Should the cover plates 4 be omitted, the panels 8 will be held against downward movement,

had

because the upper flange 10 of the uppermost panel 8 engages above the flange"? on the guard plate 6.

WVhen the winding device 19 is put into operation, through the instrumentality of the crank 20, the flexible element 16 is reeled in, the flexible elements 12 traversing the sheaves 15, and the rider 11 being raised. The rider carries with it the lowermost panel 8 and. picks up the other panels, one after.

another: Ultimately, the rider 11 abuts against the flange 7 of the guard plate 6. andments. 12 are secured at 33 to the lower flange 25 of the lowermost panel 23. In.

order that any one panel, when raised, will raise the panel next thereabove, each panel isprovided with a projection 27, which may be in the form of an angle member, the projection 27 engaging the bottom flange 25 of the next panel above, to effect a raisingof the panels, one after another, as aforesaid.

In Figures 8 and 9, the device is shown as comprising a box-like frame 41, the guard plates appearing at 421and at 43. The flange of the guard plate 32 is denoted by the numeral 47. Guide strips 44 are attached to thesides ofthe frame land are inclined with respect to the vertical. Cover plates 45 are mounted on the guide strips and define shoulders 46. Panels 48 slide between the guide strips-44,each panel comprising a lower flange 49 and an upper flange 50. The flanges 49 and '50 are disposed acutely with respect to the guide plates, the lower flange '49 on one guide plate extending beneath the upper flange 50 on the next adjoining guide plate, as shown in Figure 8; The upper flange 50 of the uppermost panel is adapted to engage above the flange47 on the plate 56, when the panels are lowered. The lower flange 49 of thelowermost panel is: secured to a rider 51. Owing to the inclination of the guide strips 44 with respect to the vertical, the panels 48 are in vertical alinement when they are lowered. Flexible elements 52 are attached to. the lowermost panel. and. are connected to a single flexible element 53. The flexible. elements 52 run over pulleys 54 on theupper end of the frame 41. Theflexible element-53 is extended downwardly over a pulley 55 on the frame and is extended upwardly over a pulley 58 on the lower portion of the frame,

into operative connection with a winding device 59 on the frame. The flexible element 53 is disposed parallel to a guide rod 57, lowered exteriorly of the frame 41 and connected at'its ends thereto. A weight 56 is carried by the flexible element 53 and is mounted for reciprocation on the guide 57 The latch which holds the door closed, is denoted by the numeral 60.

The operation of the device shown in Figures 8 and 9 does not differ materially from the operation of that form which is depicted in Figure 3, but it is to be observed that the construction is such that the panels 48 when lowered or closed are in vertical alinement, it being possible to raise the panels, the panels moving into compact form between the plates 42and 43.

What is claimed is 1- 1. In a device of the class described, a frame, guard plates on the front and the back ofthe frame, and projecting downwardly from the top of the frame, one guard plate being vertically disposed and having an inwardlyj projecting flange, the other guard plate inclining inwardly and downwardly, guides. secured to. the sides of the frame and inclined to correspond with the inclination of the last specified guard plate, the guidesextending from the top of the frame to. the front of the frame, panels slidable in the guides, each panel having a transverse topflangeand a transverse bottom flange, the top flange of the uppermost panel. engagingabove the flange of the firstspecified guard plate when the panels are lowered, the upper flanges-of the other panels engaging. above the lower flanges of the panels nextthereabove, arider projecting horizontally from the lowermost panel and adapted to engage the other panels, to raise them, when the lowermost panel is raised, and meansv for raising the rider.

2. In a device of the class described, a

frame, guard plates on the front and the back of the frame and projecting down wardlyfrom the top of the frame, oneof the guard plates being vertically disposed and having. an inwardly projecting flange, the other guard plate beingr downwardly and forwardly inclined, guides extending from the top of the frame to the front thereof andinclined to correspond to the inclination offthe last specified guard plate, panels slidable in the frame, each panel having a transverse top flange and. a trans.- verse bottom flange, the topflange of the uppermost panel-engagingabove the flange ofv the first specified guardfplate when the panels: are lowered, the upper flanges ofthe other panels engaging thelower flangesof the panels, next thereabove, a rider secured to the lowermostpanel and engaged to engage the superposed panels, to raise them,

when the rider is raised, a base member carrying the frame and extended in front of the frame, the base member having a recess adapted to receive the rider when the ride-r is lowered, and means for raising the rider.

3. In a device of the class described, a frame, guard plates secured to the front and the back of the frame and projecting downwardly from the top of the frame, one guard plate having an inwardly projecting flange and being vertically disposed, the other guard plate being downwardly and inwardlyj inclined, guides extended between the top of the frame and the front of the frame, and inclined to correspond with the inclination of the last specified guard plate, panels slidable in the guides, each panel having a transverse top flange and a transverse bottom flange, the top flange of the uppermost panel engaging above the flange of the first specified guard plate when the panels are lowered, the upper flanges of the other panels engaging above the lower flanges of the panels next thereabove, means for raising the lowermost panel, and means for transmitting movement to the remaining panels, one after another to raise them when the lowermost panel is raised, all of the panels being housedbetween the guard plates when the panels are raised. In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

FRANK A. BURKART. Witnesses:

H. J. S. REYNOLDS, PHILIP T. BURHART. 

